Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Holographic digital watermark










Image Number 5 for United States Patent #7551750.

A digital watermark which is incorporated, perceptibly or imperceptibly, into a diffractive device such as a hologram. When applied to protect and/or authenticate a document of value or a product, the device provides an increased degree of overt and covert security, and permits tracking of the sale, use or other parameters associated with the product and/or document of value.








 
 
  Recently Added Patents
Ink composition, ink for inkjet recording and ink set using the ink
Depth estimation apparatus and method
Fuel cell with air channel actuator
Integrated advance copper fuse combined with ESD/over-voltage/reverse polarity protection
Polishing composition
Inter-carrier communications for multimedia-message delivery
Software self-checking systems and methods
  Randomly Featured Patents
Method and apparatus for enabling a privacy feature in a communications network
Machine sortable mailing envelope
Method and apparatus for stripping holes in a metal substrate
Exercise device and exercise adapter for forming same
Carbon-containing monolithic glasses and ceramics prepared by a sol-gel process
Method and apparatus for separation of magnetically responsive spheres
Systems, devices, and methods for controllably coupling qubits
Seatback device
Pivot hinge assembly for glass structure
Chain scarf fashion accessory and method of manufacture